20477032520 has 64 divisors (see below), whose sum is σ = 52751882880. Its totient is φ = 7007809536.

The previous prime is 20477032493. The next prime is 20477032529. The reversal of 20477032520 is 2523077402.

It is not an unprimeable number, because it can be changed into a prime (20477032529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86312 + ... + 220008.

It is an arithmetic number, because the mean of its divisors is an integer number (824248170).

Almost surely, 2^20477032520 is an apocalyptic number.

20477032520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20477032520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26375941440).

20477032520 is an abundant number, since it is smaller than the sum of its proper divisors (32274850360).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20477032520 is a wasteful number, since it uses less digits than its factorization.

20477032520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134262 (or 134258 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 32.

The spelling of 20477032520 in words is "twenty billion, four hundred seventy-seven million, thirty-two thousand, five hundred twenty".